dentify the type of observational study -The incidence rate of smoking among people who have died from heart disease is determined by investigating past medical records Group of answer choices 1. Retrospective (looking at a period of time in the past) 2. cross-sectional (could be past present or future but only at one point in time) 3. Prospective (looking at a period of time in the future)
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Identify the type of observational study
-The incidence rate of smoking among people who have died from heart disease is determined by investigating past medical records
Group of answer choices
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